Number of gene clusters identified only in family; the number of genomes is reported on the x axis and the amount of shared genes is reported on the y axis

<p><b>Copyright information:</b></p><p>Taken from "A global gene evolution analysis on family using phylogenetic profile"</p><p>http://www.biomedcentral.com/1471-2105/8/S1/S23</p><p>BMC Bioinformatics 2007;8(Suppl 1):S23-S23.</p><p>Published online 8 Mar 2007</p><p>PMCID:PMC1885853.</p><p></p> In the first histogram, for example, there are 11 groups of each composed by 2 genomes